Air Sealing for Utah Homes

Targeted sealing at top plates, chases, and penetrations before insulation. Blower door guidance and rebate-compliant documentation.

Air sealing is the zipper on the jacket: insulation slows conduction, but leaks erase performance when wind and stack effect move air through the envelope. In Salt Lake’s older housing stock, the attic floor is usually the leakiest plane — can lights, interior wall tops, plumbing stacks, and dropped soffits create highways for conditioned air to dump into vented attics.

What we seal first

Top plates and partition intersections, bath fan and kitchen exhaust paths, chase walls around flues (with fire-rated details), and large bypasses at platform framing. We use foams, gaskets, and rigid blocking appropriate to each penetration. The work is tedious, but it is what makes blower door numbers move and what many rebate programs require before paying on insulation alone.

Testing

When helpful, we run blower door guided sealing to find unexpected leakage — attic hatches, whole-house fan shutters, and pet-door-level gaps show up quickly under pressure. For customers who love data, before-and-after numbers translate abstract “tight home” talk into measurable CFM reduction.

Comfort and durability

Sealing reduces winter ice dam drivers by lowering heat leaking to the roof deck. It also cuts summertime humid air pulled into wall cavities. Done wrong, foam can hide leaks that should stay ventilated; we never bury knob-and-tube or scorched wiring.

Pairing with insulation

Attic air sealing plus blown coverage is the classic one-two punch. Wall injection without addressing ceiling leaks often underwhelms. We sequence work so each dollar shows up in the blower door and in your bills.

Ask about a thermal + leakage walkthrough — we’ll show you the red zones before you commit.